dgd-contributor commented on a change in pull request #33752:
URL: https://github.com/apache/spark/pull/33752#discussion_r690997628
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File path: python/pyspark/pandas/series.py
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@@ -944,6 +944,57 @@ def between(self, left: Any, right: Any, inclusive: bool =
True) -> "Series":
return lmask & rmask
+ def cov(self, other: "Series", min_periods: int = 1) -> float:
+ """
+ Compute covariance with Series, excluding missing values.
+ Parameters
+ ----------
+ other : Series
+ Series with which to compute the covariance.
+ min_periods : int, default 1
+ Minimum number of observations needed to have a valid result. None
= 1.
+
+ Returns
+ -------
+ float
+ Covariance between Series and other
+
+ Examples
+ --------
+ >>> from pyspark.pandas.config import set_option, reset_option
+ >>> set_option("compute.ops_on_diff_frames", True)
+ >>> s1 = ps.Series([0.90010907, 0.13484424, 0.62036035])
+ >>> s2 = ps.Series([0.12528585, 0.26962463, 0.51111198])
+ >>> s1.cov(s2)
+ -0.016857626527158744
+ >>> reset_option("compute.ops_on_diff_frames")
+ """
+
+ if min_periods is None:
+ min_periods = 1
+
+ if same_anchor(self, other):
+ self_column_label = verify_temp_column_name(other.to_frame(),
"__self_column__")
+ other_column_label = verify_temp_column_name(self.to_frame(),
"__other_column__")
+ combined = DataFrame(
+ self._internal.with_new_columns(
+ [self.rename(self_column_label),
other.rename(other_column_label)]
+ )
+ )
Review comment:
I think we need, to drop na row after. Can you give me a suggestion?
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